initial import of NetBSD tree

1 files changed, 114 insertions, 0 deletions

diff --git a/lib/csu/m68k/crt0.c b/lib/csu/m68k/crt0.c
new file mode 100644
index 00000000000..3f08eab70b7
--- /dev/null
+++ b/lib/csu/m68k/crt0.c
@@ -0,0 +1,114 @@
+/*	$NetBSD: crt0.c,v 1.14 1995/06/03 13:16:11 pk Exp $	*/
+/*
+ * Copyright (c) 1993 Paul Kranenburg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Paul Kranenburg.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "%W% (Erasmus) %G%";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <stdlib.h>
+
+#include "common.h"
+
+extern void	start __P((void)) asm("start");
+
+void
+start()
+{
+	struct kframe {
+		int	kargc;
+		char	*kargv[1];	/* size depends on kargc */
+		char	kargstr[1];	/* size varies */
+		char	kenvstr[1];	/* size varies */
+	};
+	/*
+	 *	ALL REGISTER VARIABLES!!!
+	 */
+	register struct kframe *kfp;
+	register char **argv, *ap;
+
+#ifdef lint
+	kfp = 0;
+	initcode = initcode = 0;
+#else /* not lint */
+	asm("lea a6@(4),%0" : "=r" (kfp));	/* catch it quick */
+#endif /* not lint */
+	argv = &kfp->kargv[0];
+	environ = argv + kfp->kargc + 1;
+
+	if (ap = argv[0])
+		if ((__progname = _strrchr(ap, '/')) == NULL)
+			__progname = ap;
+		else
+			++__progname;
+
+#ifdef DYNAMIC
+	/* ld(1) convention: if DYNAMIC = 0 then statically linked */
+#ifdef stupid_gcc
+	if (&_DYNAMIC)
+#else
+	if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
+#endif
+		__load_rtld(&_DYNAMIC);
+#endif /* DYNAMIC */
+
+asm("eprol:");
+
+#ifdef MCRT0
+	atexit(_mcleanup);
+	monstartup((u_long)&eprol, (u_long)&etext);
+#endif MCRT0
+
+asm ("__callmain:");		/* Defined for the benefit of debuggers */
+	exit(main(kfp->kargc, argv, environ));
+}
+
+#ifdef DYNAMIC
+	asm("	___syscall:");
+	asm("		movel	a7@+,a0");	/* return address */
+	asm("		movel	a7@,d0");	/* syscall number */
+	asm("		movel	a0,a7@");
+	asm("		trap	#0");		/* do system call */
+	asm("		bcc	1f");		/* check error */
+	asm("		moveq	#-1,d0");
+	asm("	1:	movel	a7@,a0");	/* get return address, leave */
+	asm("		jmp	a0@");		/* correct amount on stack */
+
+#endif /* DYNAMIC */
+
+#include "common.c"
+
+#ifdef MCRT0
+asm ("	.text");
+asm ("_eprol:");
+#endif